Untitled

import re

# Define custom exceptions for invalid date format and invalid month name
class InvalidDateFormat(Exception):
    pass

class InvalidMonthName(Exception):
    pass

# Regex patterns to validate specific components (Date and Time)
pattern_date1 = r'^\d{4}-(0[1-9]|1[0-2])-\d{2}$'  # Date part for YYYY-MM-DD
pattern_date2 = r'^\d{4}\/(0[1-9]|1[0-2])\/\d{2}$'  # Date part for YYYY/MM/DD
pattern_date3 = r'^(0[1-9]|[12][0-9]|3[01])\s([Jj]anuary|[Ff]ebruary|[Mm]arch|[Aa]pril|[Mm]ay|[Jj]une|[Jj]uly|[Aa]ugust|[Ss]eptember|[Oo]ctober|[Nn]ovember|[Dd]ecember)\s\d{4}$'  # Date part for DD Month YYYY
pattern_time = r'(0[0-9]|1[0-9]|2[0-3]):([0-5][0-9]):([0-5][0-9])$'  # Time part for HH:mm:ss

# Function to validate the date-time format
def validate_date_time(text):
    # Separate date and time based on space between them
    if ' ' not in text:
        raise InvalidDateFormat("Invalid date and time format")

    date_part, time_part = text.split(' ', 1)

    # Check if the date part is valid
    is_valid_date = (
        re.match(pattern_date1, date_part) or
        re.match(pattern_date2, date_part) or
        re.match(pattern_date3, date_part)
    )

    # Check if the time part is valid
    is_valid_time = re.match(pattern_time, time_part)

    # Handle month validation for pattern3 (DD Month YYYY)
    if re.match(pattern_date3, date_part):
        # Extract the month name (case-insensitive)
        month_name = date_part.split(' ')[1].lower()
        valid_months = ['january', 'february', 'march', 'april', 'may', 'june', 'july', 'august', 'september', 'october', 'november', 'december']
        
        # Check if the month is valid
        if month_name not in valid_months:
            raise InvalidMonthName("Invalid month name")

    # If neither date nor time is valid
    if not is_valid_date and not is_valid_time:
        raise InvalidDateFormat("Invalid date and time format")
    # If date is invalid
    elif not is_valid_date:
        raise InvalidDateFormat("Invalid date or time format")
    # If time is invalid
    elif not is_valid_time:
        raise InvalidDateFormat("Invalid date or time format")
    else:
        print(f"'{text}' is a valid date-time format.")

# Example usage:
text1 = "2025-03-22 14:30:00"
text2 = "2025/03/22 14:30:00"
text3 = "22 March 2025 14:30:00"
text4 = "2025-13-22 14:30:00"  # Invalid date (month 13)
text5 = "2025-03-22 24:60:00"  # Invalid time
text6 = "22 Munday 2025 14:30:00"  # Invalid month name

# Validate the date-time formats
try:
    validate_date_time(text1)  # Valid input
    validate_date_time(text2)  # Valid input
    validate_date_time(text3)  # Valid input
    validate_date_time(text4)  # Invalid date
    validate_date_time(text5)  # Invalid time
    validate_date_time(text6)  # Invalid month name
except InvalidDateFormat as e:
    print(e)
except InvalidMonthName as e:
    print(e)